Let the mean and the variance of 5 observations x1,x2,x3,x4,x5 be 24/5 and 194/25 respectively.

Let the mean and the variance of 5 observations x₁,x₂,x₃,x₄,x₅ be 24/5 and 194/25 respectively. If the mean and variance of the first 4 observation are 7/2 and α respectively , then (4a + x₅) is equal to:

(A) 13

(B) 15

(D) 18

Let the mean and the variance of 5 observations x1,x2,x3,x4,x5 be 24/5 and 194/25 respectively.

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